Unit heater and ventilator



I March 13,1934.

E. L. ANDERSON UNIT HEATER AND VENTILATOR Original Tiled June 12, 1930 3 Sheets-Sheet 1 INVENTOR ED WARD LflNDERSQN,

ATTORNEYS March 13, 1934. g, L. ANDERSON ,7 8. imi'r HEATER AND VENTILATOR Original Filed June 12, 1930 3 Sheets-Sheet 2 FIG. 2.

INVENTOR I EDWARD L.ANDER$0N,

ATTORNEYS MafCTi 13,1Q34. L ANDERSON 13501768 UNIT HEATER AND VENTILATOR Original Filed June 12, 1930 s Sheets-Sheet 3 'INVENTOR EDWARD LAIYDERSON,

BY W $2.1m.

ATTORNEYS Patented Mar. 13, 1934 UNITED STATES PATENT OFFICE,

.UNIT HEATER AND VENTILATOR Edward L. Anderson, Grosse Ile, Miclt, assignor to American Blower Corporation, Detroit, Mich., a corporation of Delaware Claims.

My invention relates to unit heaters and ventilators.

) It is the object of my invention to provide a unit heater and ventilator having a broad nar- 5 row air stream for delivery of fresh or heated air or for recirculated air.

It is my object'to provide a line flow fan in a unit heater and ventilator in which the axis of the fan extends parallel to the major width of the inlet opening and of the outlet opening and the air enters the side of the fan and makes its exit through the side of the fan.

It is a further object to provide a unit heater and ventilator in which there is a straight line flow in a single plane of all of the air, whether fresh air, cold air, heated air, or recirculated air.

It is a further object to provide such a unit heater and ventilator with a single control damper for inlet air and recirculated air and a single by-pass damper.

It is a further object to provide a unit heater and ventilator with a separate fan compartment, a separate heater compartment, a separate m0- tor compartment and a separate control compartment accessible, through independent doors.

This application is a division of my application, Serial No. 460,617, filed June 12, 1930.

Referring to the drawings:

Figure 1 is a front elevation of the unit heater and ventilator casing;

Figure 2 is a section on the line 22 of Figure 3;

Figure 3 is a section on the line 3-3 of Figure 2;

Figure 4 is an end elevation of the fan with the axle in section and one side of the fan partially broken away;

Figure 5 is an enlarged section through one portion of the line flow fan;

Figure 6 is a front elevation of the unit with a single door and without the side compartment;

Figure 7 .is a section of one end of the unit without the side compartment but with the motor compartment showing the arrangement of the damper and steam controls and method of support of the motor.

Referring to the drawings in detail, 1 is a front wall of the casing having side walls 2 and 3 and a rear wall 4 which has an air inlet opening 5. The front wall has a recirculation air grill 6. The front wall is provided with a fan door 7,.a pair of heatercompartment doors 8 and 9, a motor .compartment'door 10 and a control compartment door 11. Interiorly the easing is divided into a motor compartment 12, a control compartment 13, a fan compartment 14 and a heater compartment 15. In the motor compartment is a motor 16 suspended from a motor base 17, on the ledges 18 and 19 which are respectively mounted on the side walls 2 and a partition wall 20. This motor base serves as a separating partition between the motor compartment 12 and the control compartment 13. The motor 16 has its shaft 21 extended laterally through the partition 20 into the fan compartment 14 where it is supported with the depending brackets 22 and 23 that are respectively mounted on the rail 24 and the partition 25. The partition 25 is supported by the rails 24 and 26.

On this shaft 21 are mounted a series of sections of a line now fan in which the maximum diameter is many times smaller than the maximum length. The sections are comprised of end plates 27 which are bowed or bulged at their centers at 28 and are attached to the next adjacent plates so as to form a locking engagement with the shaft. Arcuate fan blades as at 29 extend parallel to the major axis of the fan.

This fan is located adjacent the fresh air inlet opening 5. This opening extends from 'a point approximately opposite to the axle 21 of the fan to the floor. Thus, the distance between the axle 21 and the floor plate 30 is more than twice the diameter of the fan. The air is guided inwardly from the area inlet opening 5 and upwardly by a partition wall 31 which has an arcuate bulge 32 for accommodating the periphery of the fan where the blades 29 are returning from the outlet of the passageway through which air is flowing to the inlet 5 thus screening the blades and reducing back flow and impeding of the air as it moves inwardly and upwardly.

The inlet of the air through the opening 5 is controlled by a quadrant-shaped damper plate 33. This plate engages the partition plate 31 and a shoulder 34 when it is in its recirculatin position. When it is in its fresh air position it engages the shoulder 34 and an arcuate partition 35 which forms the other side of the air inlet duct opposite to the Walls 31 and 32. This damper 33 is controlled by any suitable means and may be operated as a fresh air, recirculated air, or air mixing damper. It is journaled on short axles 36 in the partition 20 and in a part of the side wall 3 of the casing. It is operated through bevel gears 37 and 38 and shaft 39 which terminates in a handle 40 in the control compartment. The damper may be controlled by any suitable means, either by handle or an automatic device.

The partitions 31, 32 and 35 are supported in the transverse partition 25 which has an aperture 41 for receiving the air guided by these partitions 31, 32 and 35. This air may either flow through the by-pass area 42 and thence out the outlet grill 43 to one side of the partition 44 as it is guided by the swinging damper 45 that is hinged at 46 at the bottom of the partition 44; or it may pass over the radiator 47 within the partition 44, in. which event the damper 45 will be resting against the stops 48 carried by the side walls of the casing, or a part of the air may be passed through the area 42 and the remainder through the heater 47.

This radiator is provided with an inlet pipe 49 having a control valve 50 operated by the handle 51. The outlet line from the radiator is designated 52. Any form of radiator or control may be employed. In the event automatic controls are utilized there is ample space to accommodate them both for the motor dampers and radiator within the control compartment 13. The damper 45, for instance, .is regulated by the handle 53 within the control compartment 13.

It will be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a unit heater and ventilator, a casing having greater length than depth and having a fresh air inlet opening and a recirculation opening at the bottom and an outlet opening at the top, a line flow fan spaced from the bottom of said casing having its center approximately at the top of the fresh air inlet opening and the recirculation opening, a casing for said fan extending on one side from the top of said fresh air inlet opening to a point above the fan closely adjacent thereto and on the other side extending from the fanat a point below the horizontal diameter of the fan to a point above the fan whereby approximately one-half of the fan is exposed into the air inlet area supplied by the air inlet opening or the recirculation opening.

2. In a unit heater and ventilator, a casing having greater length than depth and having a fresh air inlet opening and a recirculation opening at the bottom and an outlet opening at the top, a line flow fan spaced from the bottom of said casing having its center approximately at the top of the air inlet opening and the recirculation opening, a casing for said fan extending on one side from the top of said air inlet opening to a point above the fan closely adjacent thereto and on the other side extending from the fan at a point below the horizontal diameter of the fan to a point above the fan whereby approximately one-half of the fan is exposed into the air inlet area supplied by the air inlet opening or the recirculation opening, and means on the first mentioned side of the casing for screening that portion of the blades of the fan which are returning from the outlet of the casing to the inlet of the casing.

3. In a unit heater and ventilator, a casing having an inlet opening, a recirculation opening and an outlet opening, a quadrant damper controlling said inlet and recirculation openings, arcuate walls forming a duct communicating with said openings, the respective walls being alternately engaged by the respective edges of said damper, a line flow fan located between the walls of said duct and said damper.

4. In a unit heater and ventilator, a casing having an inlet opening, a recirculation opening and an outlet opening, a quadrant damper controlling said inlet. and recirculation openings, arcuate walls forming a duct communicating with said openings, the respective walls being alternately engaged by the respective edges of said damper, a line flow fan located between the walls of said duct and said damper, approximately one-half of said fan extending into space outside of said casing and into the area where air is received from the inlet opening or recirculation opening.

5. In a unit heater and ventilator, a casing having an inlet opening, a recirculation opening and an outlet opening, a quadrant damper controlling said inlet and recirculation openings, arcuate walls forming a duct communicating with said openings, the respective walls being alternately engaged by the respective edges of said damper, a line flow fan located between the walls of said duct and said damper, approximately one-half of said fan extending into space outside of said duct and into the area where air is received from the inlet opening or recirculation opening, said walls being arranged closely adjacent to the blades of the fan as they return towards the inlet opening and relatively far away fromthe blades as they proceed from the inlet opening to the discharge side of the fan.

EDWARD L. ANDERSON. 

